Sum of Measures of Exterior Angle of a Polygon

Q. In quadrilateral ABCD $\angle$B$={90}^o$, $\angle$C $-\angle$D$={60}^o$ and $\angle$A $-\angle$C$-\angle$D $={10}^o$. Find $\angle$A, $\angle$C and $\angle$D.

Q. The sum of the measure of exterior angles (in degrees) of a polygon with n sides is ___.

1. 360
2. 180(n - 2)
3. 180(n + 2)
4. (n - 2)/180

Q. In triangle $ABC$, $\angle B={30}^o$ and $\angle$ C$={70}^o$. The greatest side of the triangle is

1. $AB$
2. $BC$
3. $AC$
4. Data insufficient